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Intangible Assets and Goodwill, Intangible Assets (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Dec. 31, 2013
Identifiable intangible assets [Abstract] |  |  |
Gross Value | $ 2,604.1 |  | $ 2,612.2
Accumulated Amortization | (1,169.7) |  | (1,150.0)
Carrying Value | 1,434.4 |  | 1,462.2
Amortization Expense | 24.7 | 26.9 |
Forecasted amortization expense [Abstract] |  |  |
Remainder of 2014 | 69.3 |  |
2015 | 85.3 |  |
2016 | 80.9 |  |
2017 | 85.4 |  |
2018 | 88.8 |  |
NGL Pipelines & Services [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 622.1 |  | 622.1
Accumulated Amortization | (345.5) |  | (336.9)
Carrying Value | 276.6 |  | 285.2
Amortization Expense | 8.6 | 9.6 |
NGL Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 340.8 |  | 340.8
Accumulated Amortization | (170.3) |  | (165.7)
Carrying Value | 170.5 |  | 175.1
NGL Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 281.3 |  | 281.3
Accumulated Amortization | (175.2) |  | (171.2)
Carrying Value | 106.1 |  | 110.1
Onshore Natural Gas Pipelines & Services [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 1,629.7 |  | 1,629.7
Accumulated Amortization | (623.5) |  | (611.9)
Carrying Value | 1,006.2 |  | 1,017.8
Amortization Expense | 11.6 | 12.4 |
Onshore Natural Gas Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 1,163.6 |  | 1,163.6
Accumulated Amortization | (288.5) |  | (281.2)
Carrying Value | 875.1 |  | 882.4
Onshore Natural Gas Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 466.1 |  | 466.1
Accumulated Amortization | (335.0) |  | (330.7)
Carrying Value | 131.1 |  | 135.4
Onshore Crude Oil Pipelines & Services [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 11.1 |  | 11.1
Accumulated Amortization | (6.9) |  | (6.6)
Carrying Value | 4.2 |  | 4.5
Amortization Expense | 0.3 | 0.3 |
Onshore Crude Oil Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 10.7 |  | 10.7
Accumulated Amortization | (6.6) |  | (6.3)
Carrying Value | 4.1 |  | 4.4
Onshore Crude Oil Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 0.4 |  | 0.4
Accumulated Amortization | (0.3) |  | (0.3)
Carrying Value | 0.1 |  | 0.1
Offshore Pipelines & Services [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 197.0 |  | 205.1
Accumulated Amortization | (148.0) |  | (150.4)
Carrying Value | 49.0 |  | 54.7
Amortization Expense | 2.6 | 3.0 |
Offshore Pipelines & Services [Member] | Customer relationship intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 195.8 |  | 203.9
Accumulated Amortization | (147.6) |  | (150.0)
Carrying Value | 48.2 |  | 53.9
Offshore Pipelines & Services [Member] | Contract-based intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 1.2 |  | 1.2
Accumulated Amortization | (0.4) |  | (0.4)
Carrying Value | 0.8 |  | 0.8
Petrochemical & Refined Products Services [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 144.2 |  | 144.2
Accumulated Amortization | (45.8) |  | (44.2)
Carrying Value | 98.4 |  | 100.0
Amortization Expense | 1.6 | 1.6 |
Petrochemical & Refined Products Services [Member] | Customer relationship intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 104.3 |  | 104.3
Accumulated Amortization | (39.5) |  | (38.2)
Carrying Value | 64.8 |  | 66.1
Petrochemical & Refined Products Services [Member] | Contract-based intangibles [Member] |  |  |
Identifiable intangible assets [Abstract] |  |  |
Gross Value | 39.9 |  | 39.9
Accumulated Amortization | (6.3) |  | (6.0)
Carrying Value | $ 33.6 |  | $ 33.9

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense expected to be recognized during the fifth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense expected to be recognized during the third fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense expected to be recognized during the second fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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